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  <title>对数组进行排序并保持索引关系</title>

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</div><hr /><div id="function.asort" class="refentry">
   <div class="refnamediv">
    <h1 class="refname">asort</h1>
    <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">asort</span> &mdash; <span class="dc-title">对数组进行排序并保持索引关系</span></p>

   </div>
 <div class="refsect1 description" id="refsect1-function.asort-description">
  <h3 class="title">说明</h3>
     <div class="methodsynopsis dc-description">
      <span class="type">bool</span> <span class="methodname"><strong>asort</strong></span>
       ( <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$array</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$sort_flags</code><span class="initializer"> = SORT_REGULAR</span></span>
     ] )</div>

    <p class="para rdfs-comment">
     本函数对数组进行排序，数组的索引保持和单元的关联。主要用于对那些单元顺序很重要的结合数组进行排序。
    </p>
   </div>

 <div class="refsect1 parameters" id="refsect1-function.asort-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">array</code></em></dt>

     <dd>

      <p class="para">
       输入的数组。
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">sort_flags</code></em></dt>

     <dd>

      <p class="para">
       可以用可选的参数 <em><code class="parameter">sort_flags</code></em> 改变排序的行为，详情见 <span class="function"><a href="function.sort.html" class="function">sort()</a></span>。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.asort-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.asort-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4905">
    <p><strong>Example #1 <span class="function"><strong>asort()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fruits&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">"d"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"lemon"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"a"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"orange"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"b"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"banana"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"c"&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"apple"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">asort</span><span style="color: #007700">(</span><span style="color: #0000BB">$fruits</span><span style="color: #007700">);<br />foreach&nbsp;(</span><span style="color: #0000BB">$fruits&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$key&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"</span><span style="color: #0000BB">$key</span><span style="color: #DD0000">&nbsp;=&nbsp;</span><span style="color: #0000BB">$val</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
c = apple
b = banana
d = lemon
a = orange
</pre></div>
    </div>
    <div class="example-contents"><p>
     fruits 被按照字母顺序排序，并且单元的索引关系不变。
    </p></div>
   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.asort-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.arsort.html" class="function" rel="rdfs-seeAlso">arsort()</a> - 对数组进行逆向排序并保持索引关系</span></li>
    <li class="member"><a href="array.sorting.html" class="link">数组排序函数对比</a></li>
   </ul>
  </p>
 </div>

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